cpu/mpc8xx/commproc.c

   1 /*
   2  * (C) Copyright 2000-2002
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <commproc.h>
  26
  27 #ifdef CFG_ALLOC_DPRAM
  28
  29 int dpram_init (void)
  30 {
  31         DECLARE_GLOBAL_DATA_PTR;
  32
  33         /* Reclaim the DP memory for our use. */
  34         gd->dp_alloc_base = CPM_DATAONLY_BASE;
  35         gd->dp_alloc_top  = CPM_DATAONLY_BASE + CPM_DATAONLY_SIZE;
  36
  37         return (0);
  38 }
  39
  40 /* Allocate some memory from the dual ported ram.  We may want to
  41  * enforce alignment restrictions, but right now everyone is a good
  42  * citizen.
  43  */
  44 uint dpram_alloc (uint size)
  45 {
  46         DECLARE_GLOBAL_DATA_PTR;
  47         uint addr = gd->dp_alloc_base;
  48
  49         if ((gd->dp_alloc_base + size) >= gd->dp_alloc_top)
  50                 return (CPM_DP_NOSPACE);
  51
  52         gd->dp_alloc_base += size;
  53
  54         return addr;
  55 }
  56
  57 uint dpram_base (void)
  58 {
  59         DECLARE_GLOBAL_DATA_PTR;
  60
  61         return gd->dp_alloc_base;
  62 }
  63
  64 /* Allocate some memory from the dual ported ram.  We may want to
  65  * enforce alignment restrictions, but right now everyone is a good
  66  * citizen.
  67  */
  68 uint dpram_alloc_align (uint size, uint align)
  69 {
  70         DECLARE_GLOBAL_DATA_PTR;
  71
  72         uint addr, mask = align - 1;
  73
  74         addr = (gd->dp_alloc_base + mask) & ~mask;
  75
  76         if ((addr + size) >= gd->dp_alloc_top)
  77                 return (CPM_DP_NOSPACE);
  78
  79         gd->dp_alloc_base = addr + size;
  80
  81         return addr;
  82 }
  83
  84 uint dpram_base_align (uint align)
  85 {
  86         DECLARE_GLOBAL_DATA_PTR;
  87
  88         uint mask = align - 1;
  89
  90         return (gd->dp_alloc_base + mask) & ~mask;
  91 }
  92 #endif  /* CFG_ALLOC_DPRAM */
  93
  94 #if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
  95
  96 void post_word_store (ulong a)
  97 {
  98         volatile void *save_addr =
  99                 ((immap_t *) CFG_IMMR)->im_cpm.cp_dpmem + CPM_POST_WORD_ADDR;
 100
 101         *(volatile ulong *) save_addr = a;
 102 }
 103
 104 ulong post_word_load (void)
 105 {
 106         volatile void *save_addr =
 107                 ((immap_t *) CFG_IMMR)->im_cpm.cp_dpmem + CPM_POST_WORD_ADDR;
 108
 109         return *(volatile ulong *) save_addr;
 110 }
 111
 112 #endif  /* CONFIG_POST || CONFIG_LOGBUFFER*/
 113
 114 #ifdef CONFIG_BOOTCOUNT_LIMIT
 115
 116 void bootcount_store (ulong a)
 117 {
 118         volatile ulong *save_addr =
 119                 (volatile ulong *)( ((immap_t *) CFG_IMMR)->im_cpm.cp_dpmem +
 120                                     CPM_BOOTCOUNT_ADDR );
 121
 122         save_addr[0] = a;
 123         save_addr[1] = BOOTCOUNT_MAGIC;
 124 }
 125
 126 ulong bootcount_load (void)
 127 {
 128         volatile ulong *save_addr =
 129                 (volatile ulong *)( ((immap_t *) CFG_IMMR)->im_cpm.cp_dpmem +
 130                                     CPM_BOOTCOUNT_ADDR );
 131
 132         if (save_addr[1] != BOOTCOUNT_MAGIC)
 133                 return 0;
 134         else
 135                 return save_addr[0];
 136 }
 137
 138 #endif /* CONFIG_BOOTCOUNT_LIMIT */